1-6425085-G-T

Variant names:

• chr1-6425085-G-T
• NM_031475.3:c.130G>T

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_031475.3(ESPN):​c.130G>T​(p.Ala44Ser) variant causes a missense change. The variant allele was found at a frequency of 0.0000015 in 1,336,758 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000015 (0 hom.)
• Consequence: ESPN NM_031475.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 5.85

Genes affected

ESPN (HGNC:13281): (espin) This gene encodes a multifunctional actin-bundling protein. It plays a major role in regulating the organization, dimensions, dynamics, and signaling capacities of the actin filament-rich, microvillus-type specializations that mediate sensory transduction in various mechanosensory and chemosensory cells. Mutations in this gene are associated with autosomal recessive neurosensory deafness, and autosomal dominant sensorineural deafness without vestibular involvement. [provided by RefSeq, Nov 2009]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ESPN	NM_031475.3	c.130G>T	p.Ala44Ser	missense_variant	Exon 1 of 13	ENST00000645284.1	NP_113663.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ESPN	ENST00000645284.1	c.130G>T	p.Ala44Ser	missense_variant	Exon 1 of 13		NM_031475.3	ENSP00000496593.1
ESPN	ENST00000636330.1	c.130G>T	p.Ala44Ser	missense_variant	Exon 1 of 11	5		ENSP00000490186.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000150 AC: 2 AN: 1336758 Hom.: 0 Cov.: 31 AF XY: 0.00000152 AC XY: 1 AN XY: 659180

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000189

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

Oct 03, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces alanine, which is neutral and non-polar, with serine, which is neutral and polar, at codon 44 of the ESPN protein (p.Ala44Ser). This variant is not present in population databases (gnomAD no frequency). In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be disruptive. This variant has not been reported in the literature in individuals affected with ESPN-related conditions. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.21
BayesDel_addAF	Uncertain	0.075	D
BayesDel_noAF	Benign	-0.13
CADD	Pathogenic	27
DANN	Uncertain	1.0
DEOGEN2	Benign	0.072	T;T;T
Eigen	Uncertain	0.37
Eigen_PC	Uncertain	0.36
FATHMM_MKL	Uncertain	0.90	D
LIST_S2	Benign	0.72	.;T;T
M_CAP	Pathogenic	0.82	D
MetaRNN	Uncertain	0.48	T;T;T
MetaSVM	Benign	-0.51	T
MutationAssessor	Uncertain	2.4	M;.;M
PrimateAI	Pathogenic	0.91	D
PROVEAN	Benign	-0.87	.;.;N
REVEL	Benign	0.27
Sift	Benign	0.23	.;.;T
Sift4G	Benign	0.20	.;.;T
Polyphen		0.96	D;.;D
Vest4		0.42
MutPred		0.42		Gain of disorder (P = 0.0794);Gain of disorder (P = 0.0794);Gain of disorder (P = 0.0794);
MVP		0.51
MPC		0.51
ClinPred		0.97	D
GERP RS		4.0
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.27
gMVP		0.23

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.0		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

No publications associated with this variant yet.

Other links and lift over

hg19: chr1-6485145;